Mavericks truly sucks. In addition to the problems with freezing when I wake from sleep, my laptop is now freezing at random points while in use. I'm so tired of not being able to use sleep mode. I like to keep browsers and apps open so I can pick up where I left off from my previous session, not have to start all over again. Come on, Apple. There are so many problems on this and other forums with this operating system freezing. Release a patch and fix it already. I just spent nearly $2000 for a new rMBP. They owe me (and the rest of us) more than this type of user experience.